1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
//===-- ClangUserExpression.h -----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_ClangUserExpression_h_
#define liblldb_ClangUserExpression_h_
// C Includes
// C++ Includes
#include <vector>
// Other libraries and framework includes
// Project includes
#include "ASTResultSynthesizer.h"
#include "ASTStructExtractor.h"
#include "ClangExpressionDeclMap.h"
#include "ClangExpressionHelper.h"
#include "ClangExpressionVariable.h"
#include "IRForTarget.h"
#include "lldb/Core/Address.h"
#include "lldb/Core/ClangForward.h"
#include "lldb/Expression/LLVMUserExpression.h"
#include "lldb/Expression/Materializer.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/lldb-forward.h"
#include "lldb/lldb-private.h"
namespace lldb_private {
//----------------------------------------------------------------------
/// @class ClangUserExpression ClangUserExpression.h
/// "lldb/Expression/ClangUserExpression.h"
/// @brief Encapsulates a single expression for use with Clang
///
/// LLDB uses expressions for various purposes, notably to call functions
/// and as a backend for the expr command. ClangUserExpression encapsulates
/// the objects needed to parse and interpret or JIT an expression. It
/// uses the Clang parser to produce LLVM IR from the expression.
//----------------------------------------------------------------------
class ClangUserExpression : public LLVMUserExpression {
public:
enum { kDefaultTimeout = 500000u };
class ClangUserExpressionHelper : public ClangExpressionHelper {
public:
ClangUserExpressionHelper(Target &target, bool top_level)
: m_target(target), m_top_level(top_level) {}
~ClangUserExpressionHelper() override = default;
//------------------------------------------------------------------
/// Return the object that the parser should use when resolving external
/// values. May be NULL if everything should be self-contained.
//------------------------------------------------------------------
ClangExpressionDeclMap *DeclMap() override {
return m_expr_decl_map_up.get();
}
void ResetDeclMap() { m_expr_decl_map_up.reset(); }
void ResetDeclMap(ExecutionContext &exe_ctx,
Materializer::PersistentVariableDelegate &result_delegate,
bool keep_result_in_memory);
//------------------------------------------------------------------
/// Return the object that the parser should allow to access ASTs.
/// May be NULL if the ASTs do not need to be transformed.
///
/// @param[in] passthrough
/// The ASTConsumer that the returned transformer should send
/// the ASTs to after transformation.
//------------------------------------------------------------------
clang::ASTConsumer *
ASTTransformer(clang::ASTConsumer *passthrough) override;
void CommitPersistentDecls() override;
private:
Target &m_target;
std::unique_ptr<ClangExpressionDeclMap> m_expr_decl_map_up;
std::unique_ptr<ASTStructExtractor> m_struct_extractor_up; ///< The class
///that generates
///the argument
///struct layout.
std::unique_ptr<ASTResultSynthesizer> m_result_synthesizer_up;
bool m_top_level;
};
//------------------------------------------------------------------
/// Constructor
///
/// @param[in] expr
/// The expression to parse.
///
/// @param[in] expr_prefix
/// If non-NULL, a C string containing translation-unit level
/// definitions to be included when the expression is parsed.
///
/// @param[in] language
/// If not eLanguageTypeUnknown, a language to use when parsing
/// the expression. Currently restricted to those languages
/// supported by Clang.
///
/// @param[in] desired_type
/// If not eResultTypeAny, the type to use for the expression
/// result.
//------------------------------------------------------------------
ClangUserExpression(ExecutionContextScope &exe_scope, llvm::StringRef expr,
llvm::StringRef prefix, lldb::LanguageType language,
ResultType desired_type,
const EvaluateExpressionOptions &options);
~ClangUserExpression() override;
//------------------------------------------------------------------
/// Parse the expression
///
/// @param[in] diagnostic_manager
/// A diagnostic manager to report parse errors and warnings to.
///
/// @param[in] exe_ctx
/// The execution context to use when looking up entities that
/// are needed for parsing (locations of functions, types of
/// variables, persistent variables, etc.)
///
/// @param[in] execution_policy
/// Determines whether interpretation is possible or mandatory.
///
/// @param[in] keep_result_in_memory
/// True if the resulting persistent variable should reside in
/// target memory, if applicable.
///
/// @return
/// True on success (no errors); false otherwise.
//------------------------------------------------------------------
bool Parse(DiagnosticManager &diagnostic_manager, ExecutionContext &exe_ctx,
lldb_private::ExecutionPolicy execution_policy,
bool keep_result_in_memory, bool generate_debug_info) override;
ExpressionTypeSystemHelper *GetTypeSystemHelper() override {
return &m_type_system_helper;
}
ClangExpressionDeclMap *DeclMap() { return m_type_system_helper.DeclMap(); }
void ResetDeclMap() { m_type_system_helper.ResetDeclMap(); }
void ResetDeclMap(ExecutionContext &exe_ctx,
Materializer::PersistentVariableDelegate &result_delegate,
bool keep_result_in_memory) {
m_type_system_helper.ResetDeclMap(exe_ctx, result_delegate,
keep_result_in_memory);
}
lldb::ExpressionVariableSP
GetResultAfterDematerialization(ExecutionContextScope *exe_scope) override;
private:
//------------------------------------------------------------------
/// Populate m_in_cplusplus_method and m_in_objectivec_method based on the
/// environment.
//------------------------------------------------------------------
void ScanContext(ExecutionContext &exe_ctx,
lldb_private::Status &err) override;
bool AddArguments(ExecutionContext &exe_ctx, std::vector<lldb::addr_t> &args,
lldb::addr_t struct_address,
DiagnosticManager &diagnostic_manager) override;
ClangUserExpressionHelper m_type_system_helper;
class ResultDelegate : public Materializer::PersistentVariableDelegate {
public:
ResultDelegate();
ConstString GetName() override;
void DidDematerialize(lldb::ExpressionVariableSP &variable) override;
void RegisterPersistentState(PersistentExpressionState *persistent_state);
lldb::ExpressionVariableSP &GetVariable();
private:
PersistentExpressionState *m_persistent_state;
lldb::ExpressionVariableSP m_variable;
};
ResultDelegate m_result_delegate;
};
} // namespace lldb_private
#endif // liblldb_ClangUserExpression_h_
|
